JP7064230B2 - Bar cutting machine equipped with a fixed size feed device - Google Patents

Description

The present invention relates to a bar cutting machine provided with a sizing feed device. More specifically, the present invention relates to a bar cutting machine equipped with a sizing feed device for feeding the bar to a sizing machine in order to cut an axially long bar such as a round material, a pipe material, or a deformed material. ..

In order to cut a long bar, which is a material, to a predetermined length, a bar cutting machine by sawing or shearing is used. In the conventional bar cutting machine, a long bar is fed by a predetermined length dimension (cutting length) by a sizing feed device, and then the process of cutting with the bar cutting machine is repeated to make one long bar. A plurality of rod-shaped materials having a predetermined cutting length are processed from the rod material. In order to manufacture the forging material used for precision forging, a long bar is sent in the axial direction by a predetermined length and brought into contact with the stopper, and the tip surface of the long bar is pressed against the stopper to be cut. A shearing machine is known (Patent Document 1). In the conventional sizing feed device, a long bar is gripped by a pinch roller of the sizing feed device and pressed in the axial direction (Patent Documents 2 and 3).

However, in the conventional fixed-size feed device using a pinch roller, the outer circumference of the bar is strongly gripped by a plurality of rollers, the long bar is fed by the rotation of the rollers by a predetermined length, and the bar is rotated by the rotating roller. Cut while pressing the tip surface of the stopper against the stopper. Therefore, the roller may be scratched on the outer peripheral surface of the bar during pressing of the long bar. If slip scratches are attached to the bar, product defects and cracks may occur during precision forging in the subsequent process, which may cause quality defects.

Japanese Unexamined Patent Publication No. 06-079519 Japanese Unexamined Patent Publication No. 08-318425 Japanese Unexamined Patent Publication No. 2010-269388

The present invention has been invented in the above background and achieves the following objects. An object of the present invention is to provide a bar material cutting machine provided with a sizing feed device that reduces scratches, deformation, etc. on the outer peripheral surface of the bar material.

The present invention adopts the following means in order to solve the above-mentioned problems.
That is, the bar cutting machine provided with the sizing feed device of the present invention 1 is
The housing that makes up the main body and
A first bar gripping device provided in the housing, which can open and close the outer circumference of a bar long in the axial direction with a first grip member and is guided so as to be movable in the axial direction.
A first opening / closing mechanism provided in the housing for opening / closing the first gripping member,
A first drive source provided in the housing and for driving the first opening / closing mechanism,
A guide shaft fixed to the housing in a direction parallel to the axis of the bar,
A feeding device for feeding the bar material by moving the first bar material gripping device provided in the housing and being guided by the guide shaft by a predetermined distance.
A stopper for positioning the rod in a predetermined position by abutting on the tip surface of the rod fed by the feeding device.
A second bar gripping device provided in the housing, arranged between the first bar gripping device and the stopper, and capable of opening and closing the outer circumference of the bar with a second gripping member. ,
A second opening / closing mechanism provided in the housing for opening / closing the second gripping member,
A second drive source provided in the housing and for driving the second opening / closing mechanism,
It is arranged between the second bar gripping device and the stopper, and comprises a bar cutting machine for cutting the positioned bar.
The feed device is guided by the guide shaft and moves, and the bar member is transferred via a cylinder to which the first bar member gripping device is connected and fluid is sealed or supplied to the cylinder chamber . It cushions the impact when the bar material comes into contact with the stopper.
The second opening / closing mechanism for opening / closing the second gripping member is characterized in that the rod is held at a stop position when the positioned rod is cut.

In the present invention 1, the bar material cutting machine provided with the sizing feed device of the present invention 2 has the first opening / closing mechanism in a direction orthogonal to the axis of the bar material with the first gripping member . It is characterized by being a parallel link mechanism for moving.

In the present invention 1 or 2, the bar material cutting machine provided with the constant size feeding device of the present invention 3 is such that the feeding device is rotatably attached to the ball nut provided in the first bar material gripping device and the housing. It is characterized by comprising a ball screw supported and mounted on the housing and screwed into the ball nut, and a servomotor mounted on the housing and connected to the ball screw.

In the bar cutting machine provided with the sizing feed device of the present invention, when the bar sent by the first bar gripping device comes into contact with the stopper and stops, the bar is gripped by the second bar gripping device. Then, the bar is held in the stop position, the first bar gripping device is opened and returned to the original position, but the feed device for feeding the bar is a cylinder in which fluid is sealed or supplied in the cylinder chamber. The bar is transferred through the rod to buffer the cushioning when the bar comes into contact with the stopper. In this way, the impact when the bar comes into contact with the stopper is buffered, so that the first The slip scratches between the bar gripping member of the bar gripping device and the outer peripheral surface of the bar can be reduced, and the occurrence of product defects and cracks during precision forging in the subsequent process can be reduced. Further, when the bar reaches the stop position, the bar is held at the stop position by the second bar gripping device, so that the bar is greatly retracted due to the reaction at the time of cutting the bar, and the feed amount at the time of the next cutting. Can be prevented from running short .

FIG. 1 is an overall front view showing a bar cutting machine equipped with the sizing feed device of the present invention. FIG. 2 is a front view showing the sizing feed device of FIG. FIG. 3 is a sectional view taken along the line AA of FIG. FIG. 4 is a view taken along the line P of FIG. FIG. 5 is a cross-sectional view taken along the line BB of FIG. FIG. 6 is a sectional view taken along the line CC of FIG. FIG. 7 is a cross-sectional view taken along the line DD of FIG. FIG. 8 is a cross-sectional view taken along the line EE of FIG. FIG. 9 is an enlarged cross-sectional view of the vicinity of the ball nut of FIG. FIG. 10 is an explanatory diagram showing a fixed size feeding operation of a bar cutting machine provided with the fixed size feeding device of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall front view showing a bar cutting machine equipped with the sizing feed device of the present invention. As shown in FIG. 1, the bar material cutting machine 100 provided with the fixed size feeding device of the present invention is composed of a bar material feeding device 101, a fixed size feeding device 102, and a bar material cutting machine 103 in order from the right side of FIG. ing. A long bar 104 is placed on a bar feeding device 101 that is long in the left-right direction in FIG. 1, and a fixed-size feeding device 102 arranged on the left side of the bar feeding device 101 makes the bar 104 a predetermined distance. Send to the cutting machine 103 side. The tip surface of the bar 104 comes into contact with a stopper (not shown) provided in the bar cutting machine 103 and stops, and the bar 104 is stopped by the fixed blade and the movable blade (not shown) of the bar cutting machine 103. Is cut into a forging material of a predetermined length.

2 is a front view showing the fixed size feed device 102 of FIG. 1, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. 4 is a view taken along the line P of FIG. 5 is a sectional view taken along the line BB of FIG. 2, FIG. 6 is a sectional view taken along the line CC of FIG. 3, FIG. 7 is a sectional view taken along the line DD of FIG. FIG. 9 is an enlarged cross-sectional view of the vicinity of the ball nut of FIG. As shown in FIGS. 1 to 8, the sizing feed device 102 has a hollow rectangular box-shaped housing 1 and a bracket 12 fixed to the bottom plate 11 of the housing 1. The bracket 12 is bolted to the right side surface of the bar cutting machine 103 (see FIG. 2). A first bar gripping device 2 and a second bar gripping device 3 for gripping the outer circumference of the bar (indicated by a two-dot chain line in FIG. 2) 104 are attached to the housing 1. The second bar gripping device 3 is arranged between the first bar gripping device 2 and the bar cutting machine 103, and grips the outer periphery of the bar 104 closer to the bar cutting machine 103.

The first bar gripping device 2 has a pair of gripping claws 22A and 22B that are opened and closed by a hydraulic cylinder (first drive source) 21. The hydraulic cylinder 21 is a trunnion type hydraulic cylinder, and the shaft portion 211 of the hydraulic cylinder 21 is oscillatedly supported on the horizontal portion of the L-shaped support plate 23 as seen in FIG. As shown in FIG. 7, the support plate 23 is composed of a pair of support plates 23A and 23B divided into two in the vertical direction, and the central portion in the left-right direction of FIG. 7 is connected and integrated. As shown in FIGS. 3, 6 and 7, two columnar support shafts 24A and 24B are fixed to the support plates 23A and 23B. The support shafts 24A and 24B arranged vertically are arranged symmetrically in the vertical direction as shown in FIG. 3 with the axial center of the bar 104 interposed therebetween. A lever 25A and a fan-shaped segment gear 26A are swingably supported on the upper support shaft 24A. Similarly, a lever 25B and a fan-shaped segment gear 26B are swingably supported on the lower support shaft 24B. The lever 25A and the segment gear 26A are fixed with bolts, and the lever 25B and the segment gear 26B are fixed with bolts and integrated. The teeth of the upper segment gear 26A and the teeth of the lower segment gear 26B are in mesh with each other.

The tip of the piston rod 212 of the hydraulic cylinder 21 is connected to the upper end of the upper lever 25A by a pin 213. The left end of the upper lever 25A is connected to the claw holder 27A by a pin 271A. Further, the left end of the lower lever 25B is connected to the claw holder 27B by a pin 271B. The gripping claws 22A and 22B described above are fixed to the claw holders 27A and 27B on the axial side of the bar 104, respectively, with bolts. The grip claws 22A and 22B are formed in a V shape on the axis side of the bar 104. The upper end of the claw holder 27A (as seen in FIG. 2) is connected to the upper end of the support plate 23B and the flat plate-shaped lever 28A. The right end of the upper lever 28A is connected to the upper end of the support plate 23B by a pin 281A, and the left end of the lever 28A is connected to the upper end of the claw holder 27A by a pin 282A (see FIG. 2). The pin 282A is pivotally supported by a flat plate 272A fixed to the upper end of the claw holder 27A. Similarly, the lower end of the claw holder 27B (as seen in FIG. 2) is connected to the lower end of the support plate 23B by a flat plate-shaped lever 28B. The right end of the lower lever 28B is connected to the lower end of the support plate 23B by a pin 281B, and the left end of the lever 28B is connected to the lower end of the claw holder 27B by a pin 282B (see FIG. 2). The pin 282B is pivotally supported by a flat plate 272B fixed to the lower end of the claw holder 27B.

As shown in FIG. 2, the upper link mechanism (first opening / closing mechanism) composed of the support plate 23B, the lever 25A, the claw holder 27A, the flat plate 272A, and the lever 28A forms a four-node link mechanism. Similarly, the lower link mechanism (first opening / closing mechanism) composed of the support plate 23B, the lever 25B, the claw holder 27B, the flat plate 272B, and the lever 28B also forms a four-node link mechanism. As shown in the lower four-node link mechanism, since the lengths of the opposing links are the same (L1 = L2, L3 = L4), the lower four-node link mechanism forms a parallel link mechanism. Similar to the lower side, the upper four-node link mechanism also constitutes a parallel link mechanism because the lengths of the opposing links are the same.

Therefore, when the hydraulic cylinder 21 operates and the piston rod 212 advances, the lever 25A swings counterclockwise (see in FIGS. 2 and 6) about the support shaft 24A. The swinging motion of the lever 25A is transmitted to the segment gear 26B via the segment gear 26A, and the lever 25B also swings clockwise (see in FIGS. 2 and 6) around the support shaft 24B. As a result, the claw holder 27A and the claw holder 27B move inward in the direction orthogonal to the axis of the bar 104 while maintaining an orthogonal state with respect to the axis of the bar 104 and close, and the gripping claws 22A and 22B are closed. To grip the outer circumference of the bar 104. Further, when the piston rod 212 of the hydraulic cylinder 21 retracts, the claw holder 27A and the claw holder 27B move outward in the direction orthogonal to the axis of the bar 104 while maintaining an orthogonal state with respect to the axis of the bar 104. After moving, the gripping claws 22A and 22B move and open in a direction away from the outer periphery of the rod 104. As shown in FIG. 6, guide bushes 71 and 72 are attached to the shaft core positions of the bar 104. The guide bush 71 is bolted to the support plate 23, and the guide bush 72 is bolted to the right side plate 14. The guide bushes 71 and 72 guide the bar 104 passing through the sizing feed device 102 so that the bar 104 can be smoothly fed.

As shown in FIGS. 3, 7, and 8, two guide shafts 4 and 4 are fixed between the left side plate (side plate on the bar cutting machine 103 side) 13 and the right side plate 14 of the housing 1. There is. The guide shafts 4 and 4 are long cylinders in the left-right direction (horizontal direction) of FIGS. 7 and 8, and are arranged in parallel with each other separated in the vertical direction (vertical direction). Cylindrical linear bearings 41 and 41 are slidably fitted to the guide shafts 4 and 4, respectively. Circulating steel balls are built in the linear bearings 41 and 41, and the linear bearings 41 and 41 are smoothly slid along the guide shafts 4 and 4. Further, one ball screw 5 is rotatably supported between the left side plate 13 and the right side plate 14 of the housing 1.
The ball screw 5 is arranged at an intermediate position in the vertical direction of the guide shafts 4 and 4, and is arranged parallel to the guide shafts 4 and 4 (horizontal direction). A ball nut 51 is externally fitted to the ball screw 5. A circulating steel ball is built in the ball nut 51, and the ball nut 51 is smoothly slid along the rotating ball screw 5. A servomotor 6 is attached to the lower part of the lower guide shaft 4 on the right side plate 14. A pulley 62 is fixed to the output shaft 61 of the servomotor 6, and is connected to the pulley 63 fixed to the right end of the ball screw 5 by a belt 64. Therefore, the rotation of the output shaft 61 of the servomotor 6 is transmitted to the ball screw 5, and the ball nut 51 moves along the ball screw 5.

As shown in FIGS. 3 and 8, the ball nut 51 is bolted to the cylindrical piston 52, and the piston 52 is slidably fitted in the cylinder chamber 54 of the cylindrical cylinder 53. As shown in FIG. 9, compressed air is constantly supplied to the cylinder chamber 54. Therefore, the piston 52 is constantly pressed to the right in FIGS. 8 and 9, and the nut 55 screwed into the left end of the piston 52 abuts on the left end surface of the cylinder 53 to stop the movement of the piston 52 to the right. ing. The cylinder 53 and the linear bearings 41 and 41 are connected by bolts by a plate-shaped connecting plate 56. Further, the connecting plate 56 is connected to the support plate 23A of the first bar gripping device 2 with a bolt.

When the ball nut 51 moves due to the rotation of the servomotor 6, the cylinder 53 is pushed and moved by the ball nut 51 via the compressed air in the cylinder chamber 54. The cylinder 53 is guided and moved by the guide shafts 4 and 4 via the linear bearings 41 and 41, and the first bar gripping device 2 connected to the cylinder 53 by the connecting plate 56 is also guided by the guide shafts 4 and 4. And move. When the tip surface of the bar 104 sent by the first bar gripping device 2 comes into contact with the stopper, the impact at the time of contact is transmitted from the cylinder 53 to the air in the cylinder chamber 54, and the air in the cylinder chamber 54. Is compressed to cushion the impact. In the embodiment of the present invention, compressed air is constantly supplied to the cylinder chamber 54, but air may be sealed in the cylinder chamber 54. Further, hydraulic pressure may be constantly supplied to the cylinder chamber 54, or a fluid such as oil may be sealed in the cylinder chamber 54. The servomotor 6, the ball screw 5, the ball nut 51, the guide shafts 4, 4, the linear bearings 41, 41 and the like constitute the feed device according to the embodiment of the present invention, and the first bar gripping device 2 is the bar 104. The rod 104 is fed by moving it by a predetermined distance in a direction parallel to the axis.

As shown in FIGS. 4, 6 and 7, the second bar gripping device 3 has a pair of gripping rollers 32A and 32B that are opened and closed by a pneumatic cylinder (second drive source) 31. .. The pneumatic cylinder 31 is a clevis type pneumatic cylinder, and the mounting bracket 33 is fixed to the outer surface of the left side plate 13 of the housing 1 as seen in FIG. 7, and the shaft portion 311 of the pneumatic cylinder 31 swings to the mounting bracket 33. It is movably supported. A rectangular window 15 is formed on the left side plate 13 of the housing 1, and the bar 104 is sent to the bar cutting machine 103 side through the window 15. A support metal fitting 34 is fixed to the outer surface of the left side plate 13 across the window 15, and pinion shafts 35A and 35B are rotatably supported by the support metal fitting 34. The pinion shafts 35A and 35B are arranged in the vertical direction, and are arranged on both the left and right sides of FIG. 4 with the axis of the bar 104 interposed therebetween. Pinions 36A and 36B are fixed to the upper ends of the pinion shafts 35A and 35B, and the pinion 36A and the pinion 36B are engaged with each other. A lever 37 is integrally formed on one pinion 36B, and the tip of the piston rod 312 of the pneumatic cylinder 31 is connected to the lever 37 by a pin 313.

Therefore, when the pneumatic cylinder 31 operates and the piston rod 312 advances, the lever 37 and the pinion 36B rotate counterclockwise (as seen in FIG. 7). Also, the pinion 36A rotates clockwise (as seen in FIG. 7). A roller shaft 38A eccentric with respect to the pinion shaft 35A is integrally formed at the lower end of the pinion shaft 35A, and a gripping roller 32A is rotatably supported at the lower end of the roller shaft 38A. Similarly, a roller shaft 38B eccentric with respect to the pinion shaft 35B is integrally formed at the lower end of the pinion shaft 35B, and a gripping roller 32B is rotatably supported at the lower end of the roller shaft 38B. Therefore, when the pneumatic cylinder 31 is operated, the gripping rollers 32A and 32B swing in the direction of gripping the bar member 104 or in the direction of releasing the gripping with respect to the axis of the bar member 104. A pinion 36A, a pinion 36B, a pinion shaft 35A, 35B, a roller shaft 38A, 38B, etc. constitute a second opening / closing mechanism.

[Fixed-size feed operation of the bar cutting machine 100 equipped with the fixed-size feed device 102]
FIG. 10 is an explanatory diagram showing a fixed size feeding operation of the bar cutting machine 100 provided with the fixed size feeding device 102 of the present invention. As shown in FIG. 10A, the pair of gripping rollers 32A and 32B of the second bar gripping device 3 release the gripping of the bar 104. Further, the first bar gripping device 2 is stopped at the original position at the right end in FIG. 10A. In this state, the hydraulic cylinder 21 of the first bar gripping device 2 is operated, and the outer periphery of the bar 104 is gripped by the gripping claws 22A and 22B. Next, as shown in FIG. 10 (b), the servomotor 6 is operated to move the first bar gripping device 2 toward the bar cutting machine 103 (to the left in FIG. 10 (b)) at a predetermined distance. Just move. The tip surface of the bar 104 abuts on the stopper 81 and stops.

Next, the pneumatic cylinder 31 of the second bar gripping device 3 is operated, and the outer periphery of the bar 104 is gripped by the pair of gripping rollers 32A and 32B. Therefore, the bar 104 is kept in a stopped state in contact with the stopper 81. The impact when the tip surface of the bar 104 abuts on the stopper 81 is alleviated by compressing the air in the cylinder chamber 54, so that the grip claws 22A and 22B of the first bar gripping device 2 and the bar Slip scratches between the outer peripheral surface of 104 and the outer peripheral surface of 104 are reduced. Next, as shown in FIG. 10 (c), by lowering the movable tooth 83 with respect to the fixed tooth 82 and cutting the bar 104, a forging material 84 having a predetermined length can be obtained. At the moment when the movable tooth 83 comes into contact with the bar 104, the hydraulic cylinder 21 of the first bar gripping device 2 is operated, and the servomotor 6 is operated while opening the gripping claws 22A and 22B, so that the first bar gripping device 2 is operated. The bar gripping device 2 is moved away from the bar cutting machine 103 (to the right in FIG. 10 (c)), returned to the original position at the right end shown in FIG. 10 (a), and stopped.

Next, the pneumatic cylinder 31 of the second bar gripping device 3 is operated to open the pair of gripping rollers 32A and 32B to release the gripping of the bar 104. In this way, the steps of FIGS. 10 (a) to 10 (c) described above can be repeated to manufacture a required quantity of the forging material 84. When the bar 104 comes into contact with the stopper 81 and stops, the sizing feed device 102 of the bar cutting machine 100 of the present invention grips the bar 104 with the gripping rollers 32A and 32B of the second bar gripping device 3. The bar 104 is held at the stop position. The second bar gripping device 3 can prevent the material from retreating significantly due to the reaction of the bar 104 when it is cut. If the material recedes significantly due to the reaction during cutting, the feed amount for the next cutting will be insufficient. As understood from the above description, slip scratches on the outer peripheral surface of the bar 104 are reduced, and product defects and cracks during precision forging in the subsequent process are reduced.
[Other embodiments]
The above-mentioned feeding device for the bar 104 used a ball screw 5, a ball nut 51, and a servomotor 6. However, it may be a fluid pressure cylinder device that can be digitally driven and controlled by being driven by a fluid pressure such as a feeder air pressure of the bar 104. Further, in this feeding device, when the bar 104 comes into contact with the stopper 81, the impact is transmitted from the cylinder 53 to the air in the cylinder chamber 54, and the air in the cylinder chamber 54 is compressed to alleviate the impact. .. As will be understood from this description, instead of pneumatic pressure, the shock absorbing means may be a liquid such as a spring or oil.

100 ... Bar material cutting machine 101 ... Bar material feeding device 102 ... Fixed size feeding device 103 ... Bar material cutting machine 104 ... Bar material 1 ... Housing 11 ... Bottom plate 12 ... Bracket 13 ... Left side plate 14 ... Right side plate 15 ... Window 2 ... First bar gripping device 21 ... Hydraulic cylinder 211 ... Shaft 212 ... Piston rod 213 ... Pins 22A, 22B ... Gripping claws 23 ... Support plates 23A, 23B ... Support plates 24A, 24B ... Support Shaft 25A, 25B ... Lever 26A, 26B ... Segment gear 27A, 27B ... Claw holder 271A, 271B ... Pin 272A, 272B ... Flat plate 28A, 28B ... Lever 281A, 282A ... Pin 281B, 282B ... Pin 3 ... Second rod Gripping device 31 ... Pneumatic cylinder 311 ... Shaft portion 312 ... Piston rod 313 ... Pin 32A, 32B ... Gripping roller 33 ... Mounting bracket 34 ... Support bracket 35A, 35B ... Pinion shaft 36A, 36B ... Pinion 37 ... Lever 38A, 38B ... Roller shaft 4 ... Guide shaft 41 ... Linear bearing 5 ... Ball screw 51 ... Ball nut 52 ... Piston 53 ... Cylinder 54 ... Cylinder chamber 55 ... Nut 56 ... Connecting plate 6 ... Servo motor 61 ... Output shaft 62 ... Pulley 63 ... Pulley 64 ... Belts 71, 72 ... Guide bush 81 ... Stopper 82 ... Fixed teeth 83 ... Movable teeth 84 ... Forging material

Claims (3)

The housing that makes up the main body and
A first bar gripping device provided in the housing, which can open and close the outer circumference of a bar long in the axial direction with a first grip member and is guided so as to be movable in the axial direction.
A first opening / closing mechanism provided in the housing for opening / closing the first gripping member,
A first drive source provided in the housing and for driving the first opening / closing mechanism,
A guide shaft fixed to the housing in a direction parallel to the axis of the bar,
The first bar gripping device provided in the housing and guided by the guide shaft is moved in a direction parallel to the axis of the bar by a predetermined distance to feed the bar. With the feeder,
A stopper for positioning the rod in a predetermined position by abutting on the tip surface of the rod fed by the feeding device.
A second bar gripping device provided in the housing, arranged between the first bar gripping device and the stopper, and capable of opening and closing the outer circumference of the bar with a second gripping member. ,
A second opening / closing mechanism provided in the housing for opening / closing the second gripping member,
A second drive source provided in the housing and for driving the second opening / closing mechanism,
It is arranged between the second bar gripping device and the stopper, and comprises a bar cutting machine for cutting the positioned bar.
The feed device is guided by the guide shaft and moves, and the bar member is transferred via a cylinder to which the first bar member gripping device is connected and fluid is sealed or supplied to the cylinder chamber . It cushions the impact when the bar material comes into contact with the stopper.
The second opening / closing mechanism for opening / closing the second gripping member is characterized in that the rod is held at a stop position when the positioned rod is cut. A bar cutting machine equipped with a feeder. In the bar cutting machine provided with the sizing feed device according to claim 1,
The first opening / closing mechanism is a bar cutting device provided with a sizing feed device, which is a parallel link mechanism for moving the first gripping member in a direction orthogonal to the axis of the bar. Machine. In the bar cutting machine provided with the sizing feed device according to claim 1 or 2.
The feeder is
The ball nut provided in the first bar gripping device and
A ball screw that is rotatably supported by the housing, mounted on the housing, and screwed into the ball nut,
A bar cutting machine equipped with a sizing feed device mounted on the housing and comprising a servomotor connected to the ball screw.

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